there should never be oil in the carb. if there is then you have a problem. have you tipped the motor on its side on the carb side?
5w30
it will hold about a half quart of oil
SAE 10w30 Full Synthetic.
sae-30 non-detergent
SAE 30 or 10W30 full synthetic.
For a Briggs and Stratton motor 3.5 motor used straight gas and oil in the crank-case, there is no ratio.
The engine is flooding or the spark plug is fouled and not burning all the fuel, allowing the excess gas to seep into the oil reservoir via the piston cylinder. Cleaning or changinge the spark plug and doing a carburetor adjustment will help.
the best would be to use 10w-30 synthetic oil all year long
No, never oil the carburetor linkage. Clean the linkage throughly with carburetor cleaner. If you oil the linkage it will become clogged with dust which the oil will attract.
ANSWER:?SAE30 oil above 40 degrees F (4 C) and below this temperature use 5W-30
SAE 10w30. I recommend synthetic for all air cooled engines.
Oil change indicator will come on at 49 hrs for two hrs of operation than will reset itself.